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Originally Posted by Undertoad
their lifespan goes way up and the number of kids in their families goes way down.
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Also, the healthier they are, the more likely they are to have multiple births. Even after removing the influence of in vitro procedures, the rate has gone up relatively dramatically in just the last 100 years.
What if, in another 1000-2000 years, we're all having litters of 3-4 at a time, with gestation periods of 14 months?